The long, burdening, inherent length of the phrase truly shows the user's approval of what/who he/she is directing the phrase at because it rejects the laziness and ease of staccato approval words such as "cool", or, "favorite."

Sami: Look at my sloth hands! Aren't they adorable?
Jake: Sure.
Abbey: You guys are just the cookies and cream!

Abbey: I'm so cool.
Jake: The cookiest and creamiest, if I may say so myself.

after having rigorous anal sex with a partner, your partner then sharts into your urethra, you proceed to ejaculate on there face, shooting a turd missile propelled by a flood of semen (extra points if you land one on the lips).
The result appears to be delicious cookies and cream on your partners lips.
mmmmmmmmm mmm good.

I watched Zack's face as his tounge tasted the steamy cookies and cream I blew all over his face after he shit on my dick.